A lot of scientist regard biorhythms as pseudoscience. But I downloaded software for calculating biorhythms several days ago and saw very strong correlation between LSAT performance and curve of intellectual activity. Therefore it works for me. And everyone can calculate such correlation for oneself, and if is works you can lift GMAT score scheduling exam to date when intellectual level is the best.
In graphic upper curve there is my performance in LR questions of LSAT. Downstairs graphic reflects my biorhythms. Blue curve in it reflects my intellectual ability. For better demonstration i draw it in upper graphic by my hand.
not pressed downstairs graphic: